Feature:1. Durable Construction: Made of premium alloy material, this smart ring is durable and elegant, with a lightweight design, providing a comfortable and thin wearing experience.2. Multiple Function: This smart health ring offers various functions to monitor your sleep, body temperature, and steps throughout the day. Keep tracking of your health easily and conveniently.3. Practical Use: Use this fitness health ring to record your daily steps and stay motivated to achieve your fitness goals, can be a perfect companion for your active life style.4. Sleep Quality Analysis: Monitor your sleep time and sleep status with this ring tracker to understand your sleep quality and make adjustments for a better rest. Enhance your overall well being.5. Ideal Gift Choice: The sleep tracker smart ring is suitable for any occasion or holiday, such as birthdays, anniversaries, Thanksgiving, Christmas, or Valentine's Day. Give the gift of health and style with this smart ring.Specification:Item Type: Smart Ring Material: Aluminum Alloy, Electronic ComponentsBattery Type: Lithium Battery (Shipped with Built in Battery)Battery Capacity: 17mAh,Battery Life: 5-7 Days Approx.Charging Time: 45 Minutes.Package List:1 x Ring1 x Charging Cable1 x User Manual